Updated at 4:15 p.m. ET: After a day where Israeli aircraft bombed Hamas offices in Gaza and Hamas fired a rocket at Tel Aviv, Egypt's leader on Saturday night said "some indications" exist that a ceasefire might be possible.

"There are some indications that there is a possibility of a ceasefire soon, but we do not yet have firm guarantees," Egyptian President Mohammed Morsi told a joint news conference with Turkish Prime Minister Tayyip Erdogan, who was visiting Cairo.

Egypt had brokered an informal truce in October that has since collapsed, and it has said it is working for a new deal.